Standard Residential Deck Plan Information

Transcription

1 Notes: Piers required to extend 48 below ground if attached to dwelling Deck blocks are permitted for decks less than 23 5/8 above grade and not attached to dwelling The information contained in this document is for reference only. It is intended to assist homeowners with their deck project and to ensure compliance with the requirements of Ontario Building Code. The drawings and details specified are typical construction details and other methods may be permitted upon authorization from Building Services. All construction shall be inspected including footings prior to placing concrete, framing and a final inspection prior to use. Confirmation for the satisfactory compliance with the OBC will be at the discretion of the Building Official. For more complicated designs, the assistance of a professional designer should be obtained to ensure compliance with the Ontario Building Code and other regulations. It is beyond the scope of this document to detail every possible condition. Any deviation from the tables will require the plans to be sealed by a Professional Engineer or accompany a designer sheet signed for the category of building structural. All construction shall conform to the applicable Ontario Building Code as amended.

2 Steps for Obtaining Permits Standard Residential 1. Apply for Zoning Certificate Contact Planning Services for information regarding setbacks. 2. Confirm with Planning Services if any applicable law permits are required (i.e. Conservation Authority, MTO, County) Description Required Submission Status Comments Applicable Law Zoning Certificate Conservation Authority Ministry of Transportation (MTO) If applicable If applicable Building Permit Application Forms Schedule 1: Designer Information House Note: House category required for qualified designer or if plans completed by homeowner sign the exemption Site Plan Including septic location Plans Deck Framing Plan Exterior Elevations Cross Section including guards Letter of Agent If not owner Permit Fee 2 COPIES OF ALL PLANS ARE REQUIRED Decks and Septic Systems 1. Decks may not be constructed on septic leaching beds 2. If a deck is constructed over a septic tank, there shall be sufficient room for ventilation and access to service the tank. 3. Setbacks from deck pier to septic tank is to be 1.5m as per OBC. If closer, the deck pier may be 1m away from tank provided the depth is the same as tank. 4. Setbacks from deck pier to a leaching bed is to be 2.5m to edge of bed.

3 Structural Requirements Joists, Beams & Piers Ontario Building Code span tables A1 & A-8 from Division B Part 9 are provided for floor joists and beams within a building. These tables do not account for snow load or drift load. The Township of Oro-Medonte uses Guthrie from SB1 for Climatic data, factored Part 9 snow load of 2.0kPa. If the live load will exceed 2.0kPa including hot tubs or drift loading it must be designed by a professional person. Any deviation from the tables will require the plans to be sealed by a Professional Engineer or accompany a designer sheet signed for the category of building structural. Joist Spans Size Spacing Span 12 o/c x 8 16 o/c o/c o/c x o/c o/c x o/c o/c 14-0 Note: All lumber SPF or better - Solid blocking required if span exceeds 6-11 Beam Spans Joist span Pier spacing ply 2x8 2 ply 2x8 3 ply 2x8 3 ply 2x10 3 ply 2x12 4 ply 2x ply 2x8 2 ply 2x8 3 ply 2x8 3 ply 2x10 3 ply 2x12 4 ply 2x ply 2x8 3 ply 2x8 3 ply 2x8 3 ply 2x10 3 ply 2x12 4ply 2x ply 2x8 3 ply 2x8 3 ply 2x10 3 ply 2x12 3 ply 2x10 4 ply 2x8 4ply 2x ply 2x8 3 ply 2x10 3 ply 2x10 3 ply 2x12 3 ply 2x12 4 ply 2x8 4ply 2x10 4ply 2x10 Pier sizes based on joist span Joist Span Pier Spacing * * * * * Note: The maximum spacing of a pier shall be 12 without a footing * Minimum 28 x 28 footing is required for pier spacing that exceed 12

4 Post to Beam Connection Standard Residential

5 2 Ply Beam to Post Connection Connection of Floor Joist to Beam

6 Structural Requirements Ledger Board Attachment Decks are usually supported on one side by a ledger attached to the house. This ledger attachment is critical to ensure the deck is safely and securely supported. When the ledger is attached to the house, there are very specific requirements that must be met. Follow the diagrams closely for the proper attachment of the ledger. The deck ledger shall NOT be nailed to the house - it must be lagged, or bolted to the structure of the house. The size and spacing of the lag screws is based on their capacity. Lag screw values are assumed to be 325 pounds for 1/2-inch lag screws and 190 pounds for 3/8-inch lag screws. The span of the floor joists determines how much load is being transferred to the ledger and thus to the lag screws. DECK LEDGER TO HOUSE ATTACHMENT LAG BOLT SPACING Lag Bolt Size Joist Span /2 32 o/c 16 o/c 12 o/c Equivalent 16 o/c Joist Spacing Every Other Joist Space Every Joist Space Each Joist Space with Two Every Other Space 3/8 24 o/c 12 o/c 8 o/c Equivalent 16 o/c Joist Spacing Two Every Third Joist Space Each Joist Space with Two Every Other Space Two Each Joist Space Deck ledgers shall be minimum 2x8 pressure-preservative-treated No. 2 grade lumber or other approved materials as determined by good engineering practices. When deck ledgers are attached to engineered wood products (structural composite lumber rimboard or laminated veneer lumber), the ledger board attachment shall be designed in accordance with the manufacturer s recommendations or good engineering practices. LEDGER BOARD FASTENER SPACING typical spacing 2" min. NO LEAD ANCHORS 2" min. 5.5" min. for 2x8 6.5" min. for 2x10 7.5" min. for 2x12 approved fasteners; stagger in 2 rows

7 LEDGER BOARD CONNECTION TO RIM BOARD exterior sheathing existing house stud wall existing 2x or 1" minimum EWP band board 2x floor joist or wood I-joist existing foundation wall remove siding at ledger prior to installation continuous flashing with drip edge joist hanger deck joist 1 2" diameter lag screws or through-bolts with washers, or approved wood screws 2x ledger board; must be greater than or equal to the size of the joist LEDGER BOARD CONNECTION TO POURED FOUNDATION WALL embed anchors 2 1 2" minimum existing concrete or solid masonry wall to resist corrosion and decay, this area should be caulked deck joist 1 2" diameter expansion anchors with washers joist hanger 2x ledger board; must be greater than or equal to the size of the joist LEDGER BOARD CONNECTION TO BLOCK WALL embed anchors 3 1 2" minimum to resist corrosion and decay, this area should be caulked deck joist existing hollow masonry wall joist hanger 1 2" diameter approved epoxy anchors with washers 8" block wall minimum 2x ledger board; must be greater than or equal to the size of the joist Note: Ensure anchors into solid masonry of block or through bolt with a carriage bolt Top course of hollow block is typically core filled. Ensure anchors are into solid masonry or web of hollow block. Alternatively, install a carriage bolt through ledger board and block

8 Structural Requirements Stair Stringer Attachment Stair stringers shall be supported and secured.

9 STAIR STRINGER BOTTOM SUPPORT OPTIONS STAIR STRINGER TOP CONNECTION MECHANICAL FASTENER STAIR STRINGER TOP CONNECTION Straps optional

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11 SAMPLE DECK ELEVATION PLAN & DECK LATERAL SUPPORT When heights exceeds 6 SAMPLE DECK SECTION SAMPLE PLAN VIEW

12 Required Guards The OBC requires that a guards be installed on walking surfaces on each side that is not protected by a wall where [OBC Division B (1)]: there is a difference in elevation of more than 23 5/8 between the walking surface and the adjacent surface, or the adjacent surface within 3-11 from the walking surface has a slope of more than 1/12. The OBC requires that an exterior guard shall be [OBC Division B ]: not less than 36 high where the walking surface served by the guard is not more than 5-11 above finished ground level not less than 36 high for guards installed on flights of steps, where the height of a guard on a flight of steps is measured vertically from a line drawn through the leading edge of the treads served by the guard, and not less than 3-6 in all other situations The OBC also requires that guards be constructed so that [OBC Division B & ]: openings through any required guard shall be of a size that will prevent the passage of a spherical object having a diameter of more than 4, and no member, attachment or opening will facilitate climbing

13 Guards Option A : Post and Rail System CONSTRUCTION NOTES 1. Decking is omitted from the Post Detail plan view and the axonometric view for clarity. 2. Joists spaced at maximum 16 on center. 3. Maximum spacing between posts a for cedar b. 5-0 for pressure treated 4. All fasteners shall be resistant to corrosion. 5. All lumber shall be decay resistant and all cut ends of preservative treated lumber shall be treated to prevent decay. 6. Minimum height of guard for a deck between 24 and 5-11 above grade shall be Minimum height of guard for a deck more than 5-11 above grade shall be Maximum 4 opening between pickets and no member or attachment between 4 and 36 shall facilitate climbing.

14 Guards Option B : Cantilevered Picket System Note: Posts required at opening and change of direction if less than 10 pickets

15 CONSTRUCTION NOTES: 1. All fasteners shall be resistant to corrosion. 2. All lumber shall be decay resistant. All cut ends of preservative treated lumber shall be treated to prevent decay. 3. Minimum height of guard for a deck between 24 and 5-11 above grade: Minimum height of guard for a deck more than 5-11 above grade: Maximum 4 opening between pickets and no member or attachment between 5-1/2 and 36 shall facilitate climbing. 6. Composite decking is required to have BMEC or CCMC approvals 7. Pre-engineered guard systems (what you would purchase from lumber store) are required to have Ontario Engineering. 8. Any guard assembly that is site manufactured, such as wood/glass guards is required to be engineered. 9. A privacy wall / fence boards is permitted if constructed as a guard and should be discussed with Building Inspector prior to proceeding. 10. All work whether detailed on plans or not is subject to the filed approval of the Building Inspector and shall meet Ontario Building Code. 11. Footings/piers shall bear on undisturbed soil minimum 48 below grade 12. Deck blocks shall bear on stone base or native soils (top soil and organics removed) 13. Deck posts shall be centrally located on footings/piers 14. All framing connections shall be nailed in accordance with OBC Only deck boards can be secured with either nails or screws. Guards must be fastened in accordance with SB-7. a. Nailing, screws, lag bolts, and machine bolts shall not cause splitting of wood elements. b. Fasteners shall be resistant to corrosion c. All nails shall be common spiral.